Light intensity-voltage correlations and leakage-current excess noise in a single-mode semiconductor laser

Journal Article · Thu Sep 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.033823· OSTI ID:20718631

Maurin, I; Bramati, A; Giacobino, E ^[1]; Protsenko, I ^[2]; Hermier, J -P ^[1]; Grangier, P ^[2]

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1. Laboratoire Kastler Brossel, Universite Pierre et Marie Curie, Ecole Normale Superieure et CNRS, UPMC Case 74, 4 Place Jussieu, 75252 Paris Cedex 05 (France)
2. Laboratoire Charles Fabry de l'Institut d'Optique (UMR 8501), Batiment 503, 91403 Orsay Cedex (France)

Semiconductor lasers are particularly well suited for the implementation of pump-noise suppression, yielding a reduction of the intensity noise in the laser. In this simple picture, the maximal amount of squeezing is equal to the quantum efficiency. However, experimental results on intensity noise reduction by pump-noise suppression are usually above this limit. This discrepancy suggests that additional noise sources must be involved. Here we successful y interpret the full noise behavior of a single-mode laser diode far above threshold by considering two excess noise sources: the leakage current fluctuations across the laser and the Petermann excess noise. We have estimated the contribution of each noise source using the results of the correlations between the laser output intensity noise and the voltage fluctuations across the laser diode (light-voltage correlations) and obtained good agreement between our theory and experimental results.

• OSTI ID: 20718631
• Journal Information: Physical Review. A, Vol. 72, Issue 3; Other Information: DOI: 10.1103/PhysRevA.72.033823; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
ELECTRIC POTENTIAL
FLUCTUATIONS
LEAKAGE CURRENT
NOISE
QUANTUM EFFICIENCY
SEMICONDUCTOR LASERS